Portable rubbing-machine.



V. J. REED.

PORTABLE RUBBING MACHINE.

APPLICATION FILED NOV. 6, 1913. 1 y 1 22,640, Patented Dec. 29, 1914`43,30 J7 5 J 9401Af'r/ENTOR.

ED STATES PTEN VICTOR J. REED, OF ItOCKFORD, ILLINOIS, ASSIGNOR T C.MATTISON MACHINE WORKS,

OIF BELOIT, WISCONSIN, A CORPORATION 0F WISCONSIN.

PORTABLE RUBBING-MACI-IINE.

Original application filed August 9, 1913,

y Portable Rubbing-Machine, of which the lso following is aspecification, reference being had to the accompanying drawings and tothe letters and gures of reference marked thereon.

This invention relates to rubbing machines that are adapted for handcontrol ande for various rubbing operations, such as sandpapering orpolishing surfaces of furniture or other articles, the invention havingreference more particularly to a rubbing plate or block for holdingsandpaper, rubbing felt or similar devices as shown in my Patent No.1,099,617, issued June 9, 1914, of which this application is a division.

An object of the invention is to providey improvements in portablerubbing machines, particularly with reference to means for eX-peditiously connecting a rubbing medium to the machine, another objectof the invention being toprovide an improved rubbing plate `which may beconnected to the machine or may be adapted to be used separately byland, and which shall be so constructed as o enable the operator toquickly replace worn out abrading or rubbing devices, or to change suchdevices so as to adapt the implement for different classes of work.

V'Vith the above mentioned and other objects in view, the inventionconsists in interchangeable rubbing plates of novel constructionprovided with novel means for detachably'securing rubbing sheets theretoandprovided also with novel means for securing the plates to rubbingheads, and the invention consists further in the novel parts andcombinations and arrangements of parts as hereinafter particularlydescribed and claimed.

Referring to the drawings, Figure 1 is an end elevation of a rubbingmachine to which the invention is applied; Fig. 2, a horizontal sectionapproximately on the line A A in Fig. l (or more nearly on the line A Ain Fig. 6,); Fig. 3, a'fragmentary section showing details of theimproved rubbing plate; Fig. 4, a perspective view of one of thereciprocating heads of the machine inverted to which the rubbing plateis advantageously connected; Fig. 5, a perspective Specification ofLetters Patent. i Patented Dec. 29, 1914.

Serial No. 783,656. Divided and this application led November 6,

Serial No. 799,600.

view of one of the interchangeable rubbing plates; Fig. 6, alongitudinal central sectional view of the rubbing machine, and Flg. 7is a transverse section approximately on the line B-B in'Fig. 6.

Similar reference characters in the different figures of the drawingsindicate corresponding elements or features of construction hereinreferred to and described in detail.

The rubbing machine with which the improved rubbing plate preferably isused may be variously constructed and operated, a simple form ofconstruction comprising a suitable hollow frame 1 adapted to constitutean inclosing housing, the upper middle portion of which is raised andforms a hollow longitudinal rib serving as a ournal box in which is atransverse opening 2, the top of the frame having a handle 3 thereon formanually controlling the machine. A main shaft 11- is rotatably mountedin the hollow top portion' of the frame and eX- tends beyond the frameso that suitable driving means may be connected thereto, such as aflexible shaft or other means. A bevel gear wheel 5 is secured to theshaft in the opening 2 for transmitting the motion imparted to theshaft. The under side of the top proper of the frame is designed so asto constitute a foundation 6 which is provided with a downward extendingstub shaft 7 0n which a bevel gear wheel 8 is rotatably mounted and inmesh with the wheel or pinion 5, the wheel -8 being provided with acrank pin 9 for converting rotary motion into reciprocating motion foroperating the reciprocating heads. The under side of the top proper ofthe frame is provided also with a foundation plate 10 having a stubshaft 11 thereon that .extends downward, and an oscillatory lever 12 isrotatably mounted between its ends'on the stub shaft, one end portion ofthe lever being provided with a wrist pin 13 to which a pitman 14 isconnected, the pitman being connected also to the crank pin 9 foractuating the lever, .the latter having also a wrist pin 15 connectedthereto in proximity to the wrist pin 13, and the opposite end portionof the lever 12 is provided with a wrist pin 16. The lower side portionsof the frame l are adapted to guide reciprocating heads and preferablyare provided with sep- The reciprocating are provided respectively witharms 23 and 24 assisting to support two wrist pins 25 and 26 that areconnected to the heads respectively and to the arms thereon. A pitman 27is connected to the Wrist pins 15 and 25 for moving and controlling thehead 21, a pit man 28 being connected with the wrlst pins 16 and 26 foroperatingand controlling the head 22.

The under side ofthe reciprocating head 21 is provided witlr transversetapering jaw bars 29 and 30, the companion head being provided with.similar bars 29 and 30', the outer sides 31 and 32 of the bars beingcut under or inclined and also extend obliquely tothe ends of the headso as to form wedges, and the bars 29 and 29 are provided respectivelyWith guideways 33 and 33 that are adjacent to the under side of theheads.

heads are provided respectively with pivots 34 and 34 to which suitablelevers 35 and 35 are connected, the levers being provided respectivelywith pivots 36 and 36 to which locking bars 37 and 37 are connectedrespectively, the locking bars extending slidingly into, and are movablethrough, the guideways 33 and 33" respectively for locking the rubbingplates to the reciprocating heads. The levers 35 and 35 may be variouslylatched and preferably are composed of lspring-steel and have each a lip38 formed thereon adapted to engage ratchet teeth 39 suitably arrangedon the under side of the head. e

The improved rubbing plates are substantially alike and are thereforeinterchangeable, and when adapted to be used in connection with theabove described reciprocating heads, two rubbing plates, as 40 and 40',

are provided to correspond with the number of heads comprised in themachine. The upper side of the rubbing late 40l is provided with tWotapering jaw bars 41 and 42, the plate 40', having slmilar bars 41 and42 thereon, the inner sides 43 and 44 of the bars respectively being cutunder or inclined and adapted to slidingly engage the outer sides of thetwo bars that are on each one of the reciprocating heads, so as to forma dovetail and wedging connection and draw the bars of the plate snuglyto the heads. The opposite ends of each plate have bevel faces 45 and 46respectively on the upper portions thereof against which to secure asheet of sand paper or other rubbing medium. Each jaw bar 41 and 41has arecess 47 therein 'rubbing sheets 66 and 66 to receive either lockingbar 37 or 37 which securely locks the plate to the head. The jaw barsthat are on the rubbing plates have guideways 48 and 49 therein betweentheir ends and adjacent to the upper side or top of the rubbing plate,one jaw bar having also two guideways 50 and 50 in proximity to the twoend portions thereof respectively, the companion jaw bar having similarguideWays 51 andl therein. Each rubbing plate is provided with twopivots 52 and 53 to whichtwo clamping levers 54 and 55 are respectivelyconnected, the levers extending transversely to the rubbing plate andare provided with pivots 56 and 57 to which operating bars 58 and 59 areconnected respectively and arranged so as to extend through theguideways 48 and 49 and also over'the bevel faces 45 and 46respectively. Tv'vo clamp bars 60 and 61 are secured to the outer endsof the operating bars respectively and so as to extend opposite to andparallel with. the opposite ends-respectively ofthe rubbing plate, theinner edges of the bars preferably having inclined faces 62 and63respectively vthat correspond approximately to the bevel faces 45 and46, so that when the clamp bars are drawn forcibly against the beveledges, the inclined faces are forced slightly up the bevel faces so asto tightly draw sheets of sandpaper or other material on the workingface of the rubbing plate. The clamp .bar preferably is provided .withtwo guide bars 64 and 65 that are slidlngly guided in the guideways 50and v50 respectively, the clamp bar 61 being providedw'ith similar guidebars 64 and 65 that are' slidin'gly guided in the guideways 51 and 51respectively. A pair of suitable such as sandpaper, felt or othermaterial, are secured to the respective plates by means of the clampbars thereon, as shown more fully in Fig. 6. The clamp levers 54 and 55may be variously latched to the rubbing plate and may suitably becomposed of spring-steel and have lips 67 and 68 formed thereonrespectively and adapted to engage ratchet teeth 69 and 70 respectivelyformed on the upper side of the rubbing plate.

In practical use, a suitable covering is placed on the under side ofeach rubbing plate, one end' of the sheet being drawn up over the bevelface of one end of the plate andv secured thereto by the adjacent clampbar, after which the opposite end ofthe sheet is turned up over thebevel face of the opposite end of the plate and independently securedthereto by means of the adjacent clamp bar, the clamp bar tending todraw or stretch the sheet tightly on the rubbing plate. The rubbingplate maybe handled by hand or it may be connected to either one of thereciprocating heads as above explained. The result of the operation ofthe gearing of the machine obviously will be fully understood from thedescription of the construction and function of the different elementsthereof, without further explanation in detail.

Having thus described the invention, what is claimed as new isl. Arubbing device including al plate having two end portions that arebeveled on their upper or back sides,l and two clamp bars movablyarranged independently opposite to the beveled end portions respectivelyto cooperate therewith and independently guided by the plate.

2. A rubbing device including a plate having a bevel face on the normalback or upper portionvvof one end thereof, and a clamp bar movablyarranged adjacent to land opposite the bevel face to coperate therewithand having an operating bar that is slidingly guided by the plate.

3. A rubbing device including a plate having a bevel face on the normalback or upper portion of one end thereof, a clamp bar movably arrangedopposite the bevel face to cooperate slidingly therewith and having anoperating bar and also two guide bars that are movably guided by theplate.

4L. A rubbing plate having a bar on its normal back or upper sideadjacent to one end thereof, the bar having a plurality of separateguideways therein, and a clamp bar movably arranged adjacent to trhe endof the plate to cooperate therewith and having an operating bar and alsoguide bars that are movably guided in the guideways respectively.

5. A rubbing device including a stationary plate having a guideway onits normal back or upper side adjacent to one end thereof, and a clampbar movably arranged adjacent to the end of the plate to coperatetherewith and having an inclined under face that is oblique to the frontface of the plate and opposed to the normal upper side of the end, thebar having an operating bar that is slidingly guided in the guideway.

6. A rubbing device including a plate having two end portions that arebeveled on their normal back or upper Sides, twol clamp bars movablyarranged opposite to the beveled 'end portions respectively and providedwith operating bars and also guide bars respectively that are guided onthe upper sides of the plate, and independent means for independentlyoperating the operating bars respectively.

7. A rubbing machine including a recipA rocating head, a rubbing platedetachably secured to the head and having two end por tions that arebeveled on their normal back or upper sides, two clamp bars movablyarranged opposite to the beveled end portions respectively and providedwith operating bars and also guide bars respectively that are slidinglyguided by the plate, and two hand levers pivotally connected to theplate and also to the respective clamp bars.

8. ln a rubbing machine, a plate having two opposite beveled ends, andtwo clamp bars arranged opposite said ends respectively and having eacha guide bar that is movably guided by said plate to slide upon saidbeveled ends, in combination with means for operating said bars andsecuring them independently on said beveled ends.

9. In a rubbing machine, a plate having stationary guideways on the backor normal upper side of two opposite Aend portions thereof, two clampbars movably arranged adjacent to the opposite ends respectively of theplate to cooperate therewith and having guide bars slidingly guided inthe respective guideways, and independent means cooperating with theplate for independently moving the clamp bars and holding them to theadjacent ends of the plate.

l0. In a rubbing machine, the combination of a head provided with twojaw bars and a locking bar and also a lever connected to the lockingbar, and a rubbing plate provided with two jaw bars wedgingly engagingthe jaw bars of the head, the plate having a recess torreceive thelocking bar and pro-- vided with two independently movable clamp bars onopposite ends thereof, each clamp bar being provided with an operatinglever cooperating with Vthe plate to draw the clamp bar to the adjacentend of the plate.

11. A rubbing device comprising a plate having two bevel faces on theupper side csf' two opposite ends thereof respectively and alsoguideways'on the upper side adjacent to said faces, two clamp barsmovably arranged adjacent to said ends respectively and having inclinedunder faces opposite to said bevel faces respectively, the two clampbars being provided respectively with two ,Y operating bars that areslidingly guided in two of said guideways respectively, said clamp barshaving also guide bars that are slidingly guided in others of saidguideways, and two operating levers pivoted to said plate and alsopivoted to the two operating bars respectively.

In testimony whereof, l affix my signature in presence of two witnesses.

VICTOR J. REED. lVitnesses i FRANK A. Trennen, BURTON YV. NoR'roN.

